# NTSB CHI99LA248: Robinson R22, N2313D, Spring Green, WI, July 23, 1999

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 23, 1999, 12:55 local (17:55 UTC)
- Place: Spring Green, WI
- Coordinates: 43.169311, -90.060935 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.1693&lon=-90.0609&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 12, 2000
- Report: Approved by Office Director
- NTSB case key (mKey): 46892
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI99LA248
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46892/pdf
- Page: https://openairdocs.org/ntsb/CHI99LA248

## Probable cause

the pilots failure to maintain clearance with the wire.  A factor was the wire.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with object, maneuvering
  - object - wire,transmission (contributing factor)
  - clearance - not maintained, pilot in command (cause)
- Loss of control - in flight, maneuvering
- In flight collision with terrain/water, maneuvering

## Analysis

The helicopter was being used to pollinate a cornfield at the time of the accident.  The pilot stated, in a written report, that he had '... made about three to four turns near the wires at the east end of the field before striking the wire....'  The helicopter subsequently impacted the terrain.  Post accident examination of the helicopter revealed no preexisting anomalies.

## Factual narrative

On July 23, 1999 at 1255 central daylight time, a Robinson R22, N2313D, piloted by a commercial pilot, sustained substantial damage when it impacted terrain near Spring Green, Wisconsin.  The flight was conducted under the provisions of 14 CFR Part 91 and was not on a flight plan.  Visual meteorological conditions prevailed at the time of the accident.  The pilot who was the sole occupant reported no injuries.  The flight originated in Spring Green, Wisconsin for a local flight at time unknown.

The aircraft had been pollinating a cornfield.  The pilot stated, in a written report, that he had "... made about three to four turns near the wires at the east end of the field before striking the wire...."  The helicopter subsequently impacted the terrain.

Post accident examination of the helicopter revealed no preexisting anomalies.

## Aircraft

- Registration: [N2313D](https://openairdocs.org/deregistered/N2313D-1999-12-08), registration cancelled 1999-12-08, S/N 1960 (OpenAirDocs)
- Reported make and model: Robinson R22
- Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1960
- Airframe hours: 1679
- Engines: Lycoming O-320-B2C 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Other work use, Part 91
- Registered owner: K R Redell Helicopter Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, August 27, 1998, 44 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 975 total, 60 in this make and model, 726 as pilot in command, 10 in the last 90 days, 10 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 90 °F, dew point 79 °F
- Altimeter: 29.00 inHg
- Observed at: LNR, 6 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19990723009509A](https://openairdocs.org/incident/19990723009509A), Jul 23, 1999: Robsin R22BETA, Spring Green, WI, Substantial damage. R-22 helicopter was pollinating a corn field when the rotor struck a power line, and the acft crashed, other circumstances are unknown. (.19)on July 23, 1999,…

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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